Vapor chamber water-filling section sealing structure

ABSTRACT

A vapor chamber water-filling section sealing structure. The vapor chamber water-filling section sealing structure includes a main body and a capillary structure. The main body has a first plate body and a second plate body, which are correspondingly mated with each other to together define an airtight chamber and a water-filling section. A flange is disposed along an outer periphery of the main body. The water-filling section has a water-filling notch and a water-filling passage. Two ends of the water-filling passage are respectively connected with the flange and the water-filling notch to communicate with the airtight chamber. A portion of the water-filling passage that is connected with the flange is pressed to have a height equal to the height of the flange or lower than the height of the flange. The capillary structure is disposed in the airtight chamber of the main body.

The present application is a continuation of U.S. patent applicationSer. No. 15/921,662, filed on Mar. 15, 2018.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates generally to a vapor chamber water-fillingsection sealing structure, and more particularly to a vapor chamberwater-filling section sealing structure, which can increase thevapor-liquid circulation space of the internal chamber and prevent thewater-filling section protruding from the edge of the main body frombeing collided and damaged to fail.

2. Description of the Related Art

Currently, the vapor chamber is the most often seen heat dissipationstructure body. The vapor chamber mainly provides large areaface-to-face direct heat conduction, whereby the heat of one single heatsource or multiple heat sources can be quickly conducted and dissipated.The heat conduction principle of the vapor chamber is substantiallyidentical to that of the heat pipe. However, the vapor chamber iscomposed of two plate bodies, which are overlapped and mated with eachother. The edges of the two plate bodies are then sealed to form aclosed space. In addition, a water-filling tube is sandwiched andconnected between the two plate bodies. The water-filling tube protrudesfrom the edges of the two plate bodies. Via the water-filling tube, theclosed space is vacuumed and filled with water. Finally, thewater-filling tube is sealed to achieve the vapor chamber.

Please refer to FIG. 1, which is a perspective view of a conventionalvapor chamber. As shown in FIG. 1, in the manufacturing process of thevapor chamber 3, the closed space is vacuumed and filled with water viathe water-filling tube 31. Finally, the tail end of the water-fillingtube 31 is narrowed and sealed to avoid leakage of vacuum and theworking fluid. The water-filling tube 31 of the conventional vaporchamber 3 protrudes from the edge of the vapor chamber 3. Therefore,during transfer, the water-filling tube 31 is apt to be collided andbroken to cause leakage of the working fluid and the vacuum.

Please now refer to FIG. 2, which is a perspective view of anotherconventional vapor chamber. As shown in FIG. 2, the vapor chamber 3 ismainly composed of a first plate body 3 a and a second plate body 3 b,which are mated with each other by means of diffusion bonding totogether define a closed chamber (not shown). A water-filling tube 31 isheld between the first and second plate bodies 3 a, 3 b. In order tosolve the above problem that the water-filling tube 31 protrudes fromthe edge of the vapor chamber 3, the vapor chamber 3 is further formedwith an inward recessed notch 32 in which the water-filling tube 31 isdisposed. Some manufacturers further dispose a protection structure 32to up and down hold and protect the water-filling tube 31 from collisionand damage. However, the protection structure 32 will hinder the sealingoperation of the water-filling tube 31 to lead to inconvenience. Inaddition, the notch and the protection structure 32 will greatly reducethe range or capacity of the closed chamber of the vapor chamber 3. As aresult, the heat conduction efficiency of the vapor chamber 3 is greatlylowered.

In addition to the above shortcomings, in the conventional vapor chamberstructure as shown in FIGS. 1 and 2, a section is reversed for disposingthe water-filling tube 31. Therefore, it is necessary to sacrifice someportions of the vapor chamber 3. This will reduce the area of theworking portion of the vapor chamber 3. Therefore, it has become acritical topic how to eliminate the shortcomings of the conventionalvapor chamber or even omit the water-filling tube 31.

SUMMARY OF THE INVENTION

It is therefore a primary object of the present invention to provide avapor chamber water-filling section sealing structure, which can preventthe water-filling section protruding from the edge of the vapor chamberfrom being collided and damaged to fail.

To achieve the above and other objects, the vapor chamber water-fillingsection sealing structure of the present invention includes a main bodyand a capillary structure.

The main body has a first plate body and a second plate body. The firstand second plate bodies are correspondingly mated with each other totogether define an airtight chamber and a water-filling section. Aflange is disposed along an outer periphery of the main body. Thewater-filling section has a water-filling notch and a water-fillingpassage. Two ends of the water-filling passage are respectivelyconnected with the flange and the water-filling notch to communicatewith the airtight chamber. A portion of the water-filling passage thatis connected with the flange is pressed and sealed to have a heightequal to the height of the flange or lower than the height of theflange. The capillary structure is disposed in the space of the airtightchamber of the main body.

The vapor chamber water-filling section sealing structure of the presentinvention can eliminate the shortcoming of the conventional vaporchamber that the water-filling section protrudes from the edge of themain body and is apt to be collided and damaged to fail. In addition, bymeans of the design of the water-filling section of the presentinvention, the area for sealing the edges is greatly increased toenhance the tightness of the sealed edge. Also, vapor-liquid circulationspace and capacity of the internal chamber is increased to enhance theheat dissipation efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

The structure and the technical means adopted by the present inventionto achieve the above and other objects can be best understood byreferring to the following detailed description of the preferredembodiments and the accompanying drawings, wherein:

FIG. 1 is a perspective view of a conventional vapor chamber;

FIG. 2 is a perspective view of another conventional vapor chamber;

FIG. 3 is a perspective exploded view of a first embodiment of the vaporchamber water-filling section sealing structure of the presentinvention;

FIG. 4 is a perspective assembled view of the first embodiment of thevapor chamber water-filling section sealing structure of the presentinvention;

FIG. 5 is a perspective exploded view of a second embodiment of thevapor chamber water-filling section sealing structure of the presentinvention;

FIG. 6 is a perspective assembled view of the second embodiment of thevapor chamber water-filling section sealing structure of the presentinvention;

FIG. 7 is a sectional assembled view of a third embodiment of the vaporchamber water-filling section sealing structure of the presentinvention;

FIG. 8 is a sectional assembled view of a fourth embodiment of the vaporchamber water-filling section sealing structure of the presentinvention; and

FIG. 9 is a perspective assembled view of a fifth embodiment of thevapor chamber water-filling section sealing structure of the presentinvention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Please refer to FIGS. 3 and 4. FIG. 3 is a perspective exploded view ofa first embodiment of the vapor chamber water-filling section sealingstructure of the present invention. FIG. 4 is a perspective assembledview of the first embodiment of the vapor chamber water-filling sectionsealing structure of the present invention. According to the firstembodiment, the vapor chamber water-filling section sealing structure ofthe present invention includes a main body 1 and a capillary structure2.

The main body 1 has a first plate body 11 and a second plate body 12.The first and second plate bodies 11, 12 are correspondingly mated witheach other to together define an airtight chamber 13 and a water-fillingsection 15. A flange 14 is disposed along an outer periphery of the mainbody 1, (that is, the flange 14 is disposed along the outer periphery ofthe first and second plate bodies 11, 12). The water-filling section 15has a water-filling notch 151 and a water-filling passage 152. One endof the water-filling passage 152 extends to connect with the flange 14.The other end of the water-filling passage 152 connects with theairtight chamber 13 via the water-filling notch 151. A portion of thewater-filling passage 152 that extends to connect with the flange 14 ispressed to have a height equal to the height of the flange 14 or lowerthan the height of the flange 14.

The first plate body 11 has a first face 111 and a second face 112. Thesecond plate body 12 has a third face 121 and a fourth face 122. Adepression 113 and the water-filling section 15 are raised from thefirst face 111 to the second face 112 of the first plate body 11. Thethird face 121 of the second plate body 12 is correspondingly mated withthe depression 113 to form the airtight chamber 13. That is, thedepression 113 and the water-filling section 15 (the water-filling notch151 and the water-filling passage 152) are selectively raised from thesecond face 112 of the first plate body 11 or the fourth face 122 of thesecond plate body 12. In this embodiment, the depression 113 and thewater-filling section 15 are, but not limited to, raised from the secondface 112 of the first plate body 11 for illustration purposes. Asaforesaid, the third face 121 of the second plate body 12 iscorrespondingly mated with the depression 113 to seal the open side ofthe depression 113 and the open side of the water-filling section 15. Inaddition, the flange 14 of the first and second plate bodies 11, 12 issealed and connected by means of diffusion bonding. The second face 112and the fourth face 122 are respectively disposed on the upper and lowerfaces of the main body 1. The second face 112 is defined as acondensation face, while the fourth face 122 is defined as a heatabsorption face.

When sealing the water-filling passage 152, any part of thewater-filling passage 152 is selectively pressed and flattened to have aheight equal to the height of the flange 14 or lower than the height ofthe flange 14. In addition, the water-filling passage 152 can be cut tobe flush with the flange 14 or slightly retracted into the flange 14.The flange 14 of the first and second plate bodies 11, 12 has a firstnotch 141 and a second notch 142 in a position where the water-fillingnotch 151 is positioned. In the case it is necessary to cut off the partof the water-filling section 15 that protrudes from the flange 14, thefirst and second notches 141, 142 serve to reduce the possibility ofstress concentration.

The capillary structure 2 is selectively disposed on the first face 111of the first plate body 11 or the third face 121 of the second platebody 12 or both the first face 111 of the first plate body 11 and thethird face 121 of the second plate body 12. In this embodiment, thecapillary structure 2 is, but not limited to, disposed on the third face121 of the second plate body 12. The first and second plate bodies 11,12 are made of a material selected from a group consisting of aluminum,copper, commercial pure titanium, aluminum alloy, copper alloy, ceramic,stainless steel and a combination thereof. The capillary structure 2 isselected from a group consisting of sintered powder, channeled body,mesh body, fiber body and whiskers.

Please now refer to FIGS. 5 and 6. FIG. 5 is a perspective exploded viewof a second embodiment of the vapor chamber water-filling sectionsealing structure of the present invention. FIG. 6 is a perspectiveassembled view of the second embodiment of the vapor chamberwater-filling section sealing structure of the present invention. Thesecond embodiment is partially identical to the first embodiment instructure and thus will not be repeatedly described hereinafter. Thesecond embodiment is different from the first embodiment in that thewater-filling notch 151 extends to the airtight chamber 13. One end ofthe water-filling notch 151 distal from the airtight chamber 13 extendsto the water-filling passage 152. The water-filling passage 152 extendsto the flange 14. When sealing the water-filling passage 152, any partof the water-filling passage 152 is selectively pressed and flattened tohave a height equal to the height of the flange 14 or lower than theheight of the flange 14.

Please now refer to FIG. 7, which is a sectional assembled view of athird embodiment of the vapor chamber water-filling section sealingstructure of the present invention. The third embodiment is partiallyidentical to the first embodiment in structure and thus will not berepeatedly described hereinafter. The third embodiment is different fromthe first embodiment in that multiple pits 1111 are disposed on thefirst face 111 of the first plate body 11. The pits 1111 protrude andextend from the first face 111 to the depression 113 to abut against oneface of the capillary structure 2.

When the vapor-liquid circulation of the working fluid 4 in the mainbody 1 takes place, the pits 1111 serve to enhance the backflow of thecondensed working fluid 4 and increase the supporting strength betweenthe first and second plate bodies 11, 12. Alternatively, support columns(not shown) can be disposed between the first and second plate bodies11, 12. Two ends of the support columns respectively abut against thefirst and third faces 111, 121. This structure also can increase thesupporting strength between the first and second plate bodies 11, 12.

In addition, a coating can be disposed on the surfaces of the first andthird faces 111, 121 and the capillary structure as a structure forenhancing the efficiency of the vapor-liquid circulation of the workingfluid 4 in the main body 1. The coating can be a hydrophilic coating ora hydrophobic coating.

Please now refer to FIG. 8, which is a sectional assembled view of afourth embodiment of the vapor chamber water-filling section sealingstructure of the present invention. The fourth embodiment is partiallyidentical to the first embodiment in structure and thus will not berepeatedly described hereinafter. The fourth embodiment is differentfrom the first embodiment in that the capillary structure 2 is anindependent component without being previously formed on the first andsecond plate bodies 11, 12. The capillary structure 2 is directlysandwiched between the first and second plate bodies 11, 12.

Please now refer to FIG. 9, which is a perspective assembled view of afifth embodiment of the vapor chamber water-filling section sealingstructure of the present invention. The fifth embodiment is partiallyidentical to the first embodiment in structure and thus will not berepeatedly described hereinafter. The fifth embodiment is different fromthe first embodiment in that the main body 1 has a tubular body 16. Thetubular body 16 is connected with the water-filling passage 152 of thewater-filling section 15 of the main body 1. The tubular body 16 and theportion of the water-filling passage 152 that extends to the flange 14are together pressed and connected with each other to have a heightequal to the height of the flange 14 or lower than the height of theflange 14.

The vapor chamber water-filling section sealing structure of the presentinvention can eliminate the shortcoming of the conventional vaporchamber that the water-filling section protrudes from the edge of themain body and is apt to be collided and damaged to fail. In addition,the space of the internal airtight chamber can be increased to enhancethe heat conduction efficiency. Moreover, the prevent invention providesa wider airtight edge-sealing range for the first and second platebodies.

In the water-filling operation of the above embodiments of the presentinvention, the working fluid is mainly a common working fluid applied tothe general vapor chamber manufacturing process or structure. Theworking fluid is not denoted with any reference numeral in the drawingsof the respective embodiments.

The present invention has been described with the above embodimentsthereof and it is understood that many changes and modifications in suchas the form or layout pattern or practicing step of the aboveembodiments can be carried out without departing from the scope and thespirit of the invention that is intended to be limited only by theappended claims.

What is claimed is:
 1. A vapor chamber water-filling section sealingstructure comprising: a main body having a first plate body and a secondplate body, the first and second plate bodies being correspondinglymated with each other to together define an airtight chamber and awater-filling section, a flange being disposed along an outer peripheryof the main body, the water-filling section having a water-filling notchand a water-filling passage, one end of the water-filling passageextending through the flange to terminate at an edge of the flange, theother end of the water-filling passage connecting with the water-fillingnotch to communicate with the airtight chamber, a portion of thewater-filling passage that extends to the flange being pressed to have aheight equal to the height of the flange or lower than the height of theflange; and a capillary structure selectively disposed in the space ofthe airtight chamber of the main body, wherein the first plate body hasa first face and a second face, the second plate body having a thirdface and a fourth face, a depression and the water-filling section beingraised from the first face to the second face of the first plate body,the second plate body being correspondingly mated with the depression toform the airtight chamber, wherein the second face and the fourth faceare respectively disposed on the upper and lower faces of the main body,the second face being defined as a condensation face, while the fourthface being defined as a heat absorption face, the flange of the firstand second plate bodies having a first notch and a second notch in aposition where the water-filling notch is positioned, the first andsecond plate bodies being made of stainless steel.
 2. The vapor chamberwater-filling section sealing structure as claimed in claim 1, whereinthe capillary structure is selectively disposed on both the first faceof the first plate body and the third face of the second plate body. 3.The vapor chamber water-filling section sealing structure as claimed inclaim 1, wherein the water-filling notch and the water-filling passageselectively extend in a direction to the flange or the airtight chamber.